67500649 has 2 divisors, whose sum is σ = 67500650. Its totient is φ = 67500648.

The previous prime is 67500613. The next prime is 67500683. The reversal of 67500649 is 94600576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54287424 + 13213225 = 7368^2 + 3635^2 .

It is a cyclic number.

It is not a de Polignac number, because 67500649 - 2¹¹ = 67498601 is a prime.

It is not a weakly prime, because it can be changed into another prime (67500949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33750324 + 33750325.

It is an arithmetic number, because the mean of its divisors is an integer number (33750325).

Almost surely, 2^67500649 is an apocalyptic number.

It is an amenable number.

67500649 is a deficient number, since it is larger than the sum of its proper divisors (1).

67500649 is an equidigital number, since it uses as much as digits as its factorization.

67500649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 67500649 is about 8215.8778593648. The cubic root of 67500649 is about 407.1639474162.

The spelling of 67500649 in words is "sixty-seven million, five hundred thousand, six hundred forty-nine".